Yes, fast with fever, and yes, fasting is safe in the absence of a fever.Nature cure and NH are very similar, just came out at different periods. NH is essentially the offspring of nature cure, refined a bit. Today, we've taken the food and the emotional and spiritual aspects of NH into the 21st century, rather than holding on to outdated ideas, even if they were earth-shattering in their time.The 80/10/10 Diet is the obvious best choice in diet, as NVC is the best choice in language, currently. Emotionally the ability to experience emotions in the now defines modern hygiene.